Press-roll arrangement for paper-making machines



J. K. DARBY.

PRESS RoLL ARRANGEMENT FOR PAPER MAKING MACHINES.

APPLICATION FILED JUNE 7,1916. I

I Patented Jan. 6,1920.

JAMES K. DARBY, 0F CHILLICOTHE, OHIO.

PRESS-ROLL ARRANGEMENT FOR PAPER-MAKING MACHINES.

Specification of Letters Yatent.

Patented Jain, e, aeao,

Application filed June 7, 1916. Serial No. 102,194.

To all whom it may concern:

Be it known that 1, JAMES K. DARBY, a citizen of the United States,residing at Chillicothe, county of Ross, State of Ohio, have made a newand useful invention in Press- Roll Arrangements forPaper-Making'Machines, of which the following is a specification.

This invention relates to paper making machines, and particularly to thepress roll arrangement thereof.

The object of the invention is to provide a paper making machine whichis simple in structure, and which reduces the amount of space occupiedby the present types of machines.

Further objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination,location and relative arrangement of parts, all as will be more fullyhereinafter set forth, as shown by the accompanying drawing, and finallypointed out in the appended claims.

Referring to the drawing Figure 1 is a diagrammatic View in elevation ofthe common type of Fourdrinier paper making machine.

Fig. 2 is a similar View of a similar structure embodying my invention.

Fig. 3 is a similar view of a modification of the structure shown inFig. 2.

The same part is designated by the same reference numeral wherever itoccurs throughout the several views.

In the Fourdrinier type of paper-making machines, as diagrammaticallyillustrated in Fig. 1, it is customary to run the paper between a pairof rolls 1, of substantially equal diameter, a-second pair of pressrolls 2, of substantially equal diameter, a third pair of press rolls 3,of substantially equal diameter, over a receiving roll 5, and on to thedrying rolls of the machine. The paper is fed into and carried past therespective press rolls on felts 6, operating over felt rolls 4. Theaction and purpose of the pairs of rolls 1, 2, 3, is to press out thewater from the pulp sheet, which water, after being pressed out,

is sponged up by the felt carrier. It is obvious that the paper shouldpass between the pairs of rolls in order that the water may be pressedout of the pulp thereby. It is among the special purposes of mypresentinvention to provide means for pressing the aper so as to remove thewater therefrom,

employing press rolls for this purpose, and to secure the usual ornecessary number of press roll applications to the paper to expel orpress out the water'therefrom, while at the same time greatly reducingthe number of press rolls employed for this purpose, without alteringthe etliciency of the presslng action of the rolls, thereby reducing thespace occupied by the machine, the weight thereof, and the cost. In Fig.2 I show my invention as combining the pairs of press rolls 1 and 2 ofFig. 1, and reducing the number of rolls by one. In this arrangementIprovide the top press roll 8, and the bottom press roll 9, in the usualmanner, and position a third or auxiliary press roll 10, also inpressure contact with the top press roll 8, retaining substantiallyequal diameters of all of the rolls and substantially equal pressuresbetween the rolls 8 and 9, and the rolls 8 and 10. In op eration, thepaper 11, travels on or is carried by the felt 6, first between the twopress rolls 8 and 9, and then between the two press rolls 8 and 10, andthence on to the press rolls 3, receiving roll 5, &c., as aboveexplained. It will be observed that the felt carrier 6 is on one sideonly, and that is the under side of the paper at the point of application of the pressure of the pairs of rolls 8, 9, and 8, 10. It willthus be seen that by this arrangement, I eliminate one of the pressrolls of the ordinary Fourdrinier type of paper-n1aking machine, withouteliminating the number of press roll applications to the paper, andwithout requiring cooperating pairs of carrying felts at the pointswhere the paper is subjected to the pressing action of the rolls. Itwill also be seen that I retain substantial equality of diameters of thepress rolls, and secure substantially uniform degrees of pressurebetween the rolls.

In Fig. 3, I show my invention as combining the press rolls 1, 2, and 3,of Fig. 1. In this arrangement I provide the rolls 8, 9 and 10, as inFig. 2, and position above the roll 8 a similar roll 12, so that thepaper presses between the rolls 8 and 9, then between the rolls 8 and10, and finally between the rolls 8 and 12. It will be seen that thepaper in efl'ect, passes between three sets of press rolls, but inreality only four rolls are employed instead of six It will be seenfurther that inasmuch as it is customary and the eiiicien-t practice tohave a complete set of felt and felt rolls for each lll (I may be drivenpositioned in contact with air of press rolls, I am enabled to eliminateall but one felt web and one set of felt rolls, though my invention isnot to be limited in this respect as it is obvious that independentfelts may be employed if desired. I The respective press rolls 8, 10,and 12, by friction, or otherwise, and I have shown the same as beingdriven by gears carried thereby, which mesh with a' gear carried at oneend of the roll 8. My invention, however, in its broad scope is not tobe limited to this feature.

Having now set forth the-objects and nature of my invention, and havingdescribed a diagrammatic illustration of the same, to which, however, myinvention as defined in the claims is not to be limited, what I claim asnew and useful, and of my own invention, and desire to secure by LettersPatent, is,

1. In a paper making machine, the combination with a pair of press rollsadapted to allow the paper to pass therebetween, and positioned incontact with each other whereby oneof said rolls is frictionally rotatedby the other and an auxiliary press roll adapted to cooperate with oneof said press rolls to form a second pair of press rolls in the path oftravel of the paper all of said .rolls being of substantially the samediameter and mechanically operated means cooperating between saidauxiliary press roll and 'one of said first mentioned press rolls forrotating said auxiliary press roll.

2. In a paper making machine, the combination with a pair of press rollsadapted to allow the paper to pass therebetweemand each other where- 40by one ofsaid rolls is frictionally rotated by the other and anauxiliary press roll adapted to cooperate with one of said press rollsto form a second .pair of press rolls in the path of travel of the paperall of said rolls being of substantially the same diameter andmechanically operated means actuated by one'of said press rolls forrotating said auxiliary press roll.

3. In a paper making machine, the combination with a pair of press rollsadapted to allow the paper to pass therebetween, and positioned incontact with each other whereby one of said rolls is frictionallyrotated by the other and a plurality of auxiliary press rolls eachcooperating with one of said first mentioned press rolls to form aseries of presses in the path of travel of the paper all of said rollsbeing of substantially the same diameter and mechanically operated meansactuated by one of said press rolls for rotating each of said auxiliarypress rolls:

4. In a paper making machine, the combination with a pair of press rollsadapted to allow the paper to pass therebetween, and positioned incontact with each other whereby one of said rolls is frictionallyrotated by the' other and a plurality of auxiliary press rolls ea'chcooperating with one of said first mentioned press rolls to form aseries of presses in the'path of travel of the paper all-of said rollsbeing of substantially the same diameter and independent gears actuatedby one of said press rolls for rotating all of said auxiliary rolls.

In testimony whereof I have hereunto set my hand in the presence of thesubscribing witnesses, on this 31 day of May A. D., 1916.

JAMES K. DARBY. Witnesses:

NELLIF. V. TUTTLE, HORATIO C. OLAYPOOL.

